食品科学 ›› 1999, Vol. 20 ›› Issue (10): 20-23.

• 基础研究 • 上一篇    下一篇

大豆蛋白的乳化功能及表征研究

 蔡立志, 宋玉兰, 黄丽卿   

  1. 北京市粮食研究所
  • 出版日期:1999-10-15 发布日期:2011-12-06

 CAI  Li-Zhi, SONG  Yu-Lan, HUANG  Li-Qing   

  • Online:1999-10-15 Published:2011-12-06

摘要: 大豆蛋白乳化能力EC是大豆蛋白最重要的功能特性之一,建立一个科学合理的测试方法是十分必要的。本文根据大豆蛋白的理化特性定义了EC(定义3),并对其影响因素做了系统的研究。研究结果表明,乳化方式、蛋白浓度、油脂品种、温度及NaCI的浓度对EC有不同的影响。在确定的乳化条件下,选定大豆油或花生油为油相,蛋白浓度为0.2%,温度20℃,制得乳液,离心力为21130g,离心破乳10min。测得的结果具有很好的重复性和可靠性。

关键词: 大豆蛋白, 乳化, 乳化能力

Abstract: EC (Emulsifying Capacity ) is one of the most important functionalities of soybean protein isolates It’s very necessary to establish a scientific and practicable method to determine it. According to the physico-chemical properties of soybean protein EC (Definition 3) was defined and the influential factors were systematically studied.The experimental results showed that there were some factors including emulsifying method sample’s concentration different oils temperature and NaCI content having effects on EC to certain degree. Under defined emulsifying condition, soybean oil or peanut oil as lipid phase sample’s concentration 0.2% temperature 20℃ the emulsion was prepared. Then the emulsion was centrifuged and finally EC w4s calculated according to Definition 3. The results showed satisfying repeatability and reliability.

Key words: Soybean protein isolates, emulsification, emulsifying capacity